/*
route.c -- routing
- Copyright (C) 2000 Ivo Timmermans <itimmermans@bigfoot.com>,
- 2000 Guus Sliepen <guus@sliepen.warande.net>
+ Copyright (C) 2000,2001 Ivo Timmermans <itimmermans@bigfoot.com>,
+ 2000,2001 Guus Sliepen <guus@sliepen.warande.net>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- $Id: route.c,v 1.1.2.3 2000/11/20 19:12:17 guus Exp $
+ $Id: route.c,v 1.1.2.9 2001/05/28 08:21:43 guus Exp $
*/
#include "config.h"
+#ifdef HAVE_FREEBSD
+ #include <sys/param.h>
+#else
+ #include <netinet/in.h>
+#endif
#include <utils.h>
#include <xalloc.h>
+#include <syslog.h>
#include "net.h"
#include "connection.h"
+#include "subnet.h"
+#include "route.h"
#include "system.h"
-int routing_mode = 0; /* Will be used to determine if we route by MAC or by payload's protocol */
+int routing_mode = RMODE_ROUTER;
+subnet_t mymac;
-connection_t *route_packet(vpn_packet_t *packet)
+void learn_mac(connection_t *source, mac_t *address)
{
- unsigned short type;
+ subnet_t *subnet;
cp
- type = ntohs(*((unsigned short*)(&packet.data[12])))
-
- if(routing_mode)
+ subnet = lookup_subnet_mac(address);
+
+ if(!subnet)
{
- return route_mac(packet);
+ subnet = new_subnet();
+ subnet->type = SUBNET_MAC;
+// subnet->lasttime = gettimeofday();
+ memcpy(&subnet->net.mac.address, address, sizeof(mac_t));
+ subnet_add(source, subnet);
+
+ if(debug_lvl >= DEBUG_TRAFFIC)
+ {
+ syslog(LOG_DEBUG, _("Learned new MAC address %x:%x:%x:%x:%x:%x from %s (%s)"),
+ address->x[0],
+ address->x[1],
+ address->x[2],
+ address->x[3],
+ address->x[4],
+ address->x[5],
+ source->name, source->hostname);
+ }
}
-
- switch(type)
- {
- case 0x0800:
- return route_ipv4(packet);
- case 0x86DD:
- return route_ipv6(packet);
-/*
- case 0x8137:
- return route_ipx(packet);
- case 0x0806:
- return route_arp(packet);
-*/
- default:
- if(debug_lvl >= DEBUG_TRAFFIC)
- {
- syslog(LOG_WARNING, _("Cannot route packet: unknown type %hx"), type);
- }
- return NULL;
- }
}
-connection_t *route_mac(vpn_packet_t *packet)
+connection_t *route_mac(connection_t *source, vpn_packet_t *packet)
{
- connection_t *cl;
+ subnet_t *subnet;
cp
- cl = lookup_subnet_mac((mac_t *)(&packet.data[6]));
- if(!cl)
- if(debug_lvl >= DEBUG_TRAFFIC)
- {
- syslog(LOG_WARNING, _("Cannot route packet: unknown destination address %x:%x:%x:%x:%x:%x"),
- packet.data[6],
- packet.data[7],
- packet.data[8],
- packet.data[9],
- packet.data[10],
- packet.data[11]);
- }
+ /* Learn source address */
+
+ learn_mac(source, (mac_t *)(&packet->data[0]));
+
+ /* Lookup destination address */
+
+ subnet = lookup_subnet_mac((mac_t *)(&packet->data[6]));
+
+ if(!subnet)
+ {
+ if(debug_lvl >= DEBUG_TRAFFIC)
+ {
+ syslog(LOG_WARNING, _("Cannot route packet: unknown destination address %x:%x:%x:%x:%x:%x"),
+ packet->data[6],
+ packet->data[7],
+ packet->data[8],
+ packet->data[9],
+ packet->data[10],
+ packet->data[11]);
+ }
+ return NULL;
+ }
cp
- return cl;
+ return subnet->owner;
}
-
connection_t *route_ipv4(vpn_packet_t *packet)
{
ipv4_t dest;
- connection_t *cl;
+ subnet_t *subnet;
cp
- dest = ntohl(*((unsigned long*)(&packet.data[30]);
+ dest = ntohl(*((unsigned long*)(&packet->data[30])));
- cl = lookup_subnet_ipv4(dest);
- if(!cl)
- if(debug_lvl >= DEBUG_TRAFFIC)
- {
- syslog(LOG_WARNING, _("Cannot route packet: unknown destination address %d.%d.%d.%d"),
- packet.data[30], packet.data[31], packet.data[32], packet.data[33]);
- }
+ subnet = lookup_subnet_ipv4(&dest);
+
+ if(!subnet)
+ {
+ if(debug_lvl >= DEBUG_TRAFFIC)
+ {
+ syslog(LOG_WARNING, _("Cannot route packet: unknown destination address %d.%d.%d.%d"),
+ packet->data[30], packet->data[31], packet->data[32], packet->data[33]);
+ }
+
+ return NULL;
+ }
cp
- return cl;
+ return subnet->owner;
}
connection_t *route_ipv6(vpn_packet_t *packet)
{
cp
- syslog(LOG_WARNING, _("Cannot route packet: IPv6 routing not implemented yet"));
+ if(debug_lvl > DEBUG_NOTHING)
+ {
+ syslog(LOG_WARNING, _("Cannot route packet: IPv6 routing not yet implemented"));
+ }
cp
return NULL;
}
+
+void route_outgoing(vpn_packet_t *packet)
+{
+ unsigned short int type;
+ avl_node_t *node;
+ connection_t *cl;
+cp
+ /* FIXME: multicast? */
+
+ switch(routing_mode)
+ {
+ case RMODE_ROUTER:
+ type = ntohs(*((unsigned short*)(&packet->data[12])));
+ switch(type)
+ {
+ case 0x0800:
+ cl = route_ipv4(packet);
+ break;
+ case 0x86DD:
+ cl = route_ipv6(packet);
+ break;
+ default:
+ if(debug_lvl >= DEBUG_TRAFFIC)
+ {
+ syslog(LOG_WARNING, _("Cannot route packet: unknown type %hx"), type);
+ }
+ return;
+ }
+ if(cl)
+ send_packet(cl, packet);
+ break;
+
+ case RMODE_SWITCH:
+ cl = route_mac(myself, packet);
+ if(cl)
+ send_packet(cl, packet);
+ break;
+
+ case RMODE_HUB:
+ for(node = connection_tree->head; node; node = node->next)
+ {
+ cl = (connection_t *)node->data;
+ if(cl->status.active)
+ send_packet(cl, packet);
+ }
+ break;
+ }
+}
+
+void route_incoming(connection_t *source, vpn_packet_t *packet)
+{
+ switch(routing_mode)
+ {
+ case RMODE_ROUTER:
+ memcpy(packet->data, mymac.net.mac.address.x, 6);
+ break;
+ case RMODE_SWITCH:
+ learn_mac(source, (mac_t *)(&packet->data[0]));
+ break;
+ }
+
+ accept_packet(packet);
+}
projects / tinc / blobdiff